In this article, I have collected 15 best desktop environments available for Ubuntu 12.10 (Quantal Quetzal) that can be used as a replacement for Unity. If you are interested in good design and look for your desktop, you may try the first seven desktop environments given below. If you want speed with no interest in design and desktop look, you may start from the eighth desktop environment.

Additionally, instead of installing various desktop environments on Ubuntu 12.10, you may try the different Ubuntu flavors which are:

Xubuntu - XFCE desktop environment

Kubuntu - K Desktop environment

Lubuntu - LXDE

Let's now see the various desktop environments available for Ubuntu 12.10 or older: